At A Glance

Aduna is a privately owned company focused on turning dumb searching into smart finding by creating software based on open standards that implements the concept of Guided Exploration?. Guided Exploration allows you to stop wasting time on organizing and archiving your information and stop wasting time searching for your information. It cuts both ways. So Guided Exploration saves time and money, and allows you to make smarter decisions, increase ecommerce sales, keep and grow your intellectual capital, and implode project schedules and budgets. Effortlessly and affordable.

Our passion is to enable individuals and businesses throughout the world to thrive on their collective intelligence and enable people to do new things by creating versatile, human-centered software. We focus on letting you work smarter, not harder. We make software that makes you smart.

Open Standards Only--Freedom of Choice

We're working hard to spark and lead the emerging semantic web by delivering extreme quality open software systems (applications, platform, server software, tool kits, services and technology) for end users, business engineers, enterprise developers and embedded software developers.

Inspired by Bill Joy's law "Innovation happens elsewhere" and the business value of open standards, we make sure that all our products are developed using open standards only.

The Java platform is used for all software and delivers stunning performance. W3C standards and upcoming technologies like XML, RDF/S, DAML+OIL, OWL, RQL, RDQL, and SeRQL are used for data and knowledge definitions and protocols. JXTA peer-to-peer protocols form the basis for the emerging SWAP (Semantic Web And Peer-to-peer) initiatives. APIs (Application Programmer Interfaces) are specified and published conform to industry standards (javadoc), enabling others to innovate on top of Aduna's products and technology and deploy it on the platform of choice.


Aduna's staff includes some of the most experienced technology professionals on semantic web technology, knowledge and software engineering and is backed by Meridian Holding venture capital. Aduna currently has 9 employees.

The Team

  • Jos van der Meer, Founder
  • Wil van der Meer, Founder
  • Jeroen Wester, Senior Managing Consultant
  • Jeen Broekstra, Knowledge Engineer
  • Christiaan Fluit, Lead Engineer, Visualization
  • Herko ter Horst, Senior Developer
  • Arjohn Kampman, Senior Developer
  • Hilde Bleeker, Controller

Innovation on a Scientific Bedrock

Professor Frank van Harmelen from the Vrije Universiteit in our Science Board plays a pivotal role between our business and the emerging semantic web technology standards. Frank van Harmelen connects the scientific world, W3C and the business world, causing us to quickly adopt new standards as well as setting them. SeRQL, for instance, is developed by Aduna and quickly gains acceptance in the semantic web community led by Tim Berners-Lee as preferred query language.

Innovation & Development is Aduna's heart and soul. It is our source of disruptive innovation. Building, keeping and growing a sharp and focused team creating the next generation semantic web technology is hard to do and it is our core, our reason of existence. We regularly have students from different universities for a practical period, and temporary additional consultants for particular needs (e.g. market research, business strategy definition, etc.). and the Semantic Web community led by Tim Berners-Lee. We are primarily driven and motivated by high-quality technology and people, and realistic modesty without any concession to high ambition levels.


The inspiring center of Amersfoort forms the basis for all our efforts. Directions to our office:

Prinses Julianaplein 14 b
3817 CS Amersfoort
The Netherlands
Phone: +31 33 465 9987
Fax: +31 33 465 9987

Differentiation by Guided Exploration

Spectacle's Guided Exploration raises the standard for finding information to the next level. Spectacle trivializes the engines used by companies like Amazon. Aduna aims to provide the default finding engine, globally. Now everyone can set up their own Amazon-like shop, either on the internet or in the enterprise in just a couple of weeks due to a number of key implementation characteristics that allow for effortless mass customization:

  • Versatility: applicable to any domain, from retail to parts manufacturers, from knowledge management to ecommerce;
  • Performance: scales to millions of objects with thousands of facets each and hundreds of thousands of simultaneous users, with a customized view for every individual user;
  • Evolvability: new demands driven by marketing and sales can be realized in a day, or two.
  • Affordability: Pay-for-use based licensing, short time to service (days or weeks, rather than months), and low-cost hardware add to your bottom line.

Business Model

Aduna generates revenue through two programs: selling and licensing software products and professional services & training.

Products & Solutions

Aduna offers two high-performing products: AutoFocus and Spectacle Suite. The AutoFocus solution complements basic search with Guided Exploration and is built using components from Spectacle Suite.

AutoFocus Personal & AutoFocus Server
Aduna AutoFocus comes in two flavors: AutoFocus Personal and AutoFocus Server . AutoFocus Personal brings Guided Exploration in a sophisticated "humane" interface to every desktop and puts users back in control over their documents, no matter where they are. AutoFocus Server adds Guided Exploration to free text searches on web sites or intranets. Aduna AutoFocus' Guided Exploration makes affordable, fast and precise searching (or finding, as we prefer to call it) available to everyone.

Spectacle Suite
Aduna Spectacle Suite offers a high performance, scalable, light-weight and flexible way to slice and dice this knowledge in unforeseen ways. Its like a mutual reinforcing combination of next generation data mining and search engines, and akin to the pivot tables in spreadsheets that give multi-dimensional access to distributed sources of both structured and unstructured information, yet on a much larger scale. Doing so, documents, travel destinations, used cars, electronic parts, DVDs, movies, music, job vacancies, what have you, show up at the right time and in the right context.

The following building blocks make up Spectacle Suite:

  • Guided Exploration Engine
    Navigation engine for millions of objects, each with thousands of facets. Loads the exploration space from Sesame or directly from the original source. Advanced behavior control. Can be embedded in web services, or render pages using JSPs and servlets.
  • Sesame
    Component for storage and querying of RDF metadata. Supports reasoning over metadata. Storage can be handled by a choice of database backends or directly in core memory, querying is supported in the expressive query language SeRQL, through a variety of access protocols (SOAP, HTTP, RMI). Serves as a hub between Bonanza and the Guided Exploration Engine, the Cluster Map Viewer and the Link Map Viewer. Find out more about Sesame at
  • Cluster Map Viewer Graphical
    Component for visualization and manipulation of Venn-diagrams. Receives information from Sesame or directly from original source.
  • Link Map Viewer Graphical
    Component for visualization and manipulation of networked graphs. Receives information from Sesame or directly from original source.
  • Bonanza
    Manages the Diggers that crawl web sites or file systems. Hands over the raw material to a set of document-specific Sievers that extract relevant metadata. Next, this metadata is stored in Sesame.